<template>
  <div>
    <!--    面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

<!--    卡片视图-->
    <el-card>
<!--      添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
  <!--      角色列表-->
      <el-table :data="rolesList"border stripe>
  <!--      展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']"
                    v-for="(item1,i1) in scope.row.children":key="item1.id">
  <!--            渲染一级权限-->
              <el-col span="5">
                <el-tag closable
                        @close="removeRightById(scope.row,item1.id)">
                  {{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
  <!--            渲染二级和三级-->
              <el-col span="19">
                <el-row :class="[i2 === 0?'':'bdtop','vcenter']"
                        v-for="(item2,i2) in item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success"
                            closable
                            @close="removeRightById(scope.row,item2.id)">
                      {{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning"v-for="(item3,i3) in item2.children"
                            :key="item3.id" closable
                    @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
  <!--          <pre>{{scope.row}}</pre>-->
          </template>
        </el-table-column>
  <!--      索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称"prop="roleName"></el-table-column>
        <el-table-column label="角色描述"prop="roleDesc"></el-table-column>
        <el-table-column label="操作"width="300px">
          <template slot-scope="scope">
            <el-button type="primary"icon="el-icon-edit"size="mini">
              编辑</el-button>
            <el-button type="danger"icon="el-icon-delete"size="mini">
              删除</el-button>
            <el-button type="warning"icon="el-icon-setting"size="mini"
                       @click="showSetRightDialog(scope.row)">
              分配权限</el-button>
          </template>
        </el-table-column>

      </el-table>
    </el-card>
<!--    分配权限对话框-->
    <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%"
            @close="setRightDialogClosed"
    >
<!--      树形控件-->
      <el-tree :data="rightsList":props="treeProps"
               show-checkbox node-key="id" default-expand-all
      :default-checked-keys="defKeys"ref="treeRef"></el-tree>

      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible=false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: "role",
    data(){
      return{
        //所有角色列表
        rolesList:[],
        //控制权限对话框的显示与隐藏
        setRightDialogVisible:false,
        //所有权限数据
        rightsList:[],
        // 树形控件属性绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        //默认选中的节点ID数组
        defKeys:[],
        //当前即将分配权限的角色
        roleId:[]
      }
    },
    created() {
      this.getRolesList()
    },
    methods:{
      async getRolesList(){
        const {data:res} = await this.$http.get('roles')
        if(res.meta.status !== 200)
          return this.$message.error('获取失败')
        this.rolesList = res.data
        // console.log(this.rolesList)
      },
      async removeRightById(role,rightId){
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        console.log(confirmResult)
        if(confirmResult !== 'confirm')
          return this.$message.info('取消了删除操作')

        const {data:res} = await this.$http.delete(
            `roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !== 200)
          return this.$message.error('删除失败')

        role.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role){
        this.roleId = role.id
        const {data:res} = await this.$http.get('rights/tree')
        if(res.meta.status !== 200)
          return this.$message.error('获取权限失败')
        this.rightsList = res.data
        console.log(this.rightsList)
        //递归获取三级节点的Id
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible = true
      },
      getLeafKeys(node,arr){
        if(!node.children){
          return arr.push(node.id)
        }
        node.children.forEach(item =>
        this.getLeafKeys(item,arr)
        )
      },
      //监听分配权限对话框的关闭
      setRightDialogClosed(){
        this.defKeys = []
      },
      //为角色分配权限
      async allotRights(){
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        if(res.meta.status !== 200)
          return this.$message.error('授权失败')

        this.$message.success('授权成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style scoped>
  .el-tag{
    margin:7px;
  }
  .bdtop{
    border-top:1px solid #eee;
  }
  .bdbottom{
    border-bottom:1px solid #eee;
  }
  .vcenter{
    display:flex;
    align-items:center;
  }
</style>